public class Main {
    public static void main(String[] args) {
        HashBuck hashBuck = new HashBuck();
        hashBuck.put(1,11);
        hashBuck.put(2,22);
        hashBuck.put(19,99);
        hashBuck.put(5,55);
        hashBuck.put(6,66);
        hashBuck.put(11,66);
        hashBuck.put(7,77);
        hashBuck.put(8,888);
        hashBuck.put(21,2111);

        System.out.println(hashBuck.get(5));
        System.out.println(hashBuck.get(9));

        //ConcurrentHashMap
    }

}
